Loop a long resistance band around a secure anchor at upper chest height. Stand with your right side facing the anchor point and grip the other end of the resistance band securely in your right hand. Proceed to step away from anchor point, with your arm extended directly out the side and your palm facing forward. Stand tall with your core braced and a neutral spine. This is your start position. Keeping your core braced and hips still, proceed drive your right arm directly forwards in front of you, keeping it at shoulder height. Exhale as you do so and squeeze your chest muscles as you do so. Finish the movement with your hand directly in front of you, in line with your shoulder. Maintaining control reverse the movement back to the start position. Repeat this movement for the requried number of reps (or time) on one side before changing to the other.